jenway 3345 User manual
MODEL 3345
ION METER
OPERATING MANUAL
547 009/REV A/08-99
MODEL 3345 ION METER MANUAL
SECTION 1 INTRODUCTION
Description 1.1
Specification 1.2
SECTION 2 INSTALLATION
Unpacking 2.1
Installation 2.2
Displays 2.3
Controls 2.4
Inputs/Outputs 2.5
SECTION 3 OPERATION
Menu Options 3.1
Common Menu Options 3.2
Using the unit with 2 sensors 3.3
Operating the unit with only one display 3.4
Endpoint detection 3.5
pH MODE
Setting up parameters 3.6
Entering pH Buffer Values 3.7
pH Calibration - Automatic 3.8
pH Calibration - Manual 3.9
Error Codes 3.10
Good Practice Guidelines 3.11
mV MODE
Setting up parameters 3.12
Temperature Measurement 3.13
ION ANALYSIS
Ion Selective Measurements 3.14
Good Practice Guidelines 3.15
Concentration Mode 3.16
Calibration 3.17
Entering Cal Buffer Values 3.18
Incremental Methods 3.19
Known Addition/Subtraction 3.20
Multiple Sample Addition/Subtraction 3.21
Operating the Instrument with Optional Stirrer 3.22
Datalogging 3.23
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SECTION 4 MAINTENANCE
General 4.1
Cleaning/Re-conditioning of Glass Electrodes 4.2
Ion Selective Electrodes 4.3
SECTION 5 OPTIONAL ACCESSORIES
SECTION 6 INTERFACING
GLOSSARY OF TERMS
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SECTION 1
INTRODUCTION
1.1 INSTRUMENT DESCRIPTION
The Model 3345 Ion Meter is a highly sophisticated product offering a host of valuable features, but retaining
simplicity of operation.
The structured menus allow easy access to features with single key strokes. On-line help is provided to
explain instrument functions and provide diagnostic information.
Important measurement features include the ability to operate both channels completely independently,
simultaneous display of readings and temperature on both channels, and independent indication of stable
readings. Details of the last calibration for each sensor are provided and all logged results and calibration
routines are date and time stamped, thus satisfying the requirements of Good Laboratory Practice (GLP)
quality assurance protocols.
The units will store up to 100 readings which can subsequently be recalled onto the instrument display or
downloaded to a printer or PC via the bi-directional RS232 link. User programmable options include the
ability to print out current readings or prompt calibration at pre-determined intervals and the setting of alarm
points which are activated when the measured parameters will fall outside the preset limits.
The Model 3345 offers additional flexibility with two additional modes of ion analysis - Known addition/
subtraction mode for the determination of ion concentration closer to the lower detection limit of the electrode,
and multiple Sample addition/subtraction allowing measurement in dense and concentrated matrices.
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1.2 INSTRUMENT SPECIFICATIONS
pH
Range -2 to 19.999pH
Resolution 0.1/0.01/0.001pH
Accuracy ±0.003pH
mV
Range -1999.9 to 1999.9mV
Resolution 0.1mV
Accuracy ±0.2mV
Concentration
Range 1 x 10-9 to 9.99 x 109
Units Activity, ppm, %, mg/l, M or none
Resolution 3 significant digits
Accuracy ±0.003pX for monovalent ions
Input Impedance >1013Ohms
Number of Electrode Inputs 2
Temperature
Range -10 to 105°C / 14 to 221°F
Resolution 0.1°C / 1°F
Accuracy ±0.5°C / ±1°F
ATC Range 0 to 100°C / 32 to 212°F
Manual Temp. Comp. Range 0 to 100°C / 32 to 212°F
Number of Temperature Inputs 2
Auto Buffer Recognition 2, 4, 7, 9 and 10pH buffers with manual override facility
Pre-Programmed Ion NO3-, ION+, ION2+, ION-, ION2-, H+ , SCN-, Cu2+, S2-, CN-, I-, Br-,
Characteristics Cl-, Hg+2, Cd2+, Pb2+, F-, Ag+, CO3-, Ba2+, NO2-, ClO4-, NH4+, Ca2+,
K+
Calibration 1, 2 or 3 point pH / 1, 2, 3, 4 or 5 point Concentration
Outputs Analog 1mV per digit
Bi-directional RS232
Hi/Lo alarm outputs open collector 0.5A 50V max.
Datalogger 100 results
Clock 24 hour, hrs/min/sec or day of month, month and year/leap year
corrected
Alarm Points -2 to 19.999pH
±1999.9mV
1 x 10-9 to 9.99 x 109
G.L.P. Calibration reminder with an interval of 1 to 999 hours from last
calibration Timed printout with an interval from 1 second to 1 day
Display LCD Graphics
Power Power Supply 9V a.c.
Size 275(l) x 240(w) x 150(d) mm
Weight 1.2Kg
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SECTION 2
INSTALLATION
2.1 UNPACKING
Remove the Model 3345 from the packaging and ensure the items within the package are as ordered.
Any shortages or damage should be reported immediately to the Manufacturer or your local
Distributor.
NOTE: Power Supply 021 033 is supplied with a moulded European plug. If this is not
correct for your local supply it should be cut off and a suitable local connector fitted
noting the colours of the internal conductors as follows:
Brown - Live Blue - Neutral
2.2 INSTALLATION
LCD CONTRAST
The LCD contrast can be set at any time. The LCD contrast potentiometer is accessible through the rear
panel adjacent to the power socket.
This adjustment should only need to be made on receipt of the instrument. After initial adjustment the instrument
will automatically adjust the contrast depending on the temperature of the glass.
For instruments supplied with the swing arm electrode holder the following assembly instructions should be
carried out:
1. Unpack the assembly and ensure the following items are present:
a) base block and b) swing arm. Assemble as illustrated. The moulded pivot is a tight push onto the pin.
2. Fit the pH electrode into the cut-out in the support block. The optional temperature probe, if supplied,
should be placed into the small hole in the centre of the block. The cable(s) should be passed through the
retaining clip on the holder and connected to the respective socket on the rear panel.
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SETTING LANGUAGE
Move to the SETUP menu using the arrow keys and press the key. Move the cursor to the INSTRUMENT
SETUP mode using the arrow key and press the key.Move the cursor to the LANGUAGE menu
and select the appropriate language by using the arrow keys. Once selected move to the EXIT option and
press the key. Pressing the key a second time will return the instrument to the measurement mode.
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2.3 DISPLAYS
1. PRIMARY DISPLAY -sensor 1 display currently selected as primary reading. Units
of measurement andcalibration point will also be shown at
the side of the main display.
2. TEMPERATURE DISPLAY - sensor 1 temperature display. Selected measurement unit and
MAN to indicate manual temperature will be shown at the
side of the display.
3. ENDPOINT SYMBOL -displayed once a stable reading is detected and is maintained
until the input changes.
4. ERROR MESSAGES -displays error messages for sensor 1.
5. MENU -used for selection of modes of operation. The selected
mode is reverse highlighted .
6. ICONS -used in pH and Ion modes to prompt steps of calibration and
sample measurement.
7. ERROR MESSAGES -displays error messages for sensor 2.
8. TEMP. DISPLAY -sensor 2 temperature display. Selected measurement unit and
MAN to indicate manual temperature will be shown at the
side of the display.
9. SECONDARY DISPLAY -sensor 2 display currently selected as secondary reading.
Units of measurement andcalibration point will also be shown
at the side of the main display.
10. REAL TIME CLOCK -giving continuous display of hours, minutes and seconds or
day, m onth and year. All logged results are automatically
time stamped.
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2.4 CONTROLS
Switches the instrument on and to standby.
Print key. Provides a printout of the current readings with an incremental sample number
depending on instrument operating mode. When pressed for the first time after a calibration,
the print out will give calibration information. The incremental sample number will be
reset after a calibration if auto cal print is set to on.
These keys are used to move around menus and for entering non-numerical functions.
Display select key. Used to toggle between primary and secondary displays.
Used to enter the exponential part of a value.
e.g. to enter 1.3 x 10-3 the key sequence is 1, ., 3, EXP, 3
Help key. Provides on-line help for menu options.
Used to select the displayed menu options and for entering parameters.
Used to change the sign of an entered number. It should be pressed after entering the
value. To enter a negative exponent this key should be pressed after entering the exponent
value - e.g. 1 x 10-3 - the key sequence is 1, EXP, 3, ±
Numeric keys 0 - 9 are used to enter numeric data for measurement parameters, calibration
data and limits.
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1. TEMP SOCKET 5 pin DIN socket for the automatic temperature compensation
(ATC) probe
2. pH SOCKET BNC connection socket
3. REF SOCKET 2mm pin connection socket for separate reference electrode
4. OUTPUT SOCKET 25 way D socket for RS232 and alarm connections
5. KARL FISCHER 2 x 4mm sockets. Polarised output. Karl Fischer titrations are
enabled by the provision of a 10µA polarising current output
6. ANALOG OUT 2 x 4mm sockets. Analog output proportional to primary
display reading
7. STIRRER Connection socket for optional stirrer
8. POWER IN 2.1 x 5.5mm socket allowing the power supply to be connected
to the unit
9. LCD LCD contrast potentiometer
2.5 INPUTS/OUTPUTS
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